1 /* PR middle-end/52209 */ 2 3 extern void abort (void); 4 struct S0 { int f2 : 1; } c; 5 int b; 6 7 int main()8 main () 9 { 10 b = -1 ^ c.f2; 11 if (b != -1) 12 abort (); 13 return 0; 14 } 15